Transmission



April 30, 1929... BAKER 1,710,855

TRANSMISSION Filed May 19, 1927 2 Sheets-Sheet 1 April 30, 1929. I H. w. BAKER TRANSMISS ION Filed May 19, 192.7 "2 Sheets-Sheet so p g Figure-4 is a. section on the line of I: Figure 2. i l

Patented Apr. so, 1929;. j

Bunny w. BAKER, or MONTEVIDEO, MINNESOTA.

TRANSMISSION. I

Application fired May" 19,

This invention relates to transmissions and more particularly to change speed gearing,

especially adapted for use in connection with --automobiles,' which employs a worm drive;

. throughout. i V

An important object of the .inventionis to provide a construction such that all of the elements of the drive or input shaft of the vide a device of this characterso constructed 1S PTO?" transmission may be mounted solidly upon this shaft and a single gear employedto -cl1angeably engaged therewith. 2 f

A further object of the invention is to protransmit the drive therefrom "and interthat a straight through movement vide'd-ffrom reverse to high gear.

These andother objects I attain by the construction shown in the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment of'my invention'and wherei'n: i

1 Figure 1 isia side elevationpartially broken cordance with my invention;

Figure 2 1s a vertlcal sectional view there away of--a-transmission constructed in acthrough, portions being broken awayto illustrate the construction awayof the yoke and the control lever carried thereby A i Referring now more particularlyto the ;-drawings, the numerallO generally desig-- nates' the lnput shaft of a-transm1ss1on to which, 1n accordance w1th my invention, are

Secured worms 11, 12 and 13, which are correspondingly pitched, but at varying angles and a further worm 14, which is oppositely 40. pitchedto worms 11, 12 and'13 and constitutes areverse drive gear. and 13 are multiple-threaded. I a

' Paralleling the shaft is a bar 15 upon The gears 12 bwhich is 'slidably mounted a yoke 16 pro- 45 ;vided with suitable bearings-17 for fengage- I mnent with the bar. This yoke is provided with arms 1'8"having spacedbearings 19, 2O and'21, of-which the bearings 19 and 20'are 1 single-roller bearings supporting a shaft 22 and the bearing 21 is a double roller bearingsupporting a shaft 23. Adjacent ends Figure 3 is a sideelevation partially broken pitched thereto. V the handle lever 37 is shifted to dlsengage the 1927. Serial N0. 192,689.

ofthe shafts 22 and 23arerotatably-engaged and have mounted thereon fixed and movable elements 24' and-25 of a clutch. The movable element 25 1s splined tothe shaft 23, while the statlonary element 24 is secured to the shaft 22. Betweenthe bearings 19 and 20,

the shaft 22 has secured thereto a-worm 26 meshing with a worm gear 27 splined upon an output shaft 28, which parallels the shaft 10. The outer ends of the arms 18 which are provided with bearings 19 and 20 converge to provide a bearing support 29 for the shaft.

The yoke 16l1as pivoted thereto at 30 the shlftlng lever 31 for the movable clutch element '25, which is normally engaged with the fixed clutch element by a spring 32 surrounding the shaft section 23. Likewise pivoted to the yokeis a second lever 33"extending transversely of the first named lever and having an end thereof adapted for en-.

gagement in notches 34 under the influence of-a spring 35. This lever is provided with 'a flexure 36, for the reception of the end of a pivoted operating handle 37 and beneath this 'flexure, the end of the lever 31, extends. By

rotating the-operating lever 37 about its pivot 38, the lever 33 is shifted against the action ited' oscillation thereof, while preventingrelative'rotation. The amount of oscillation of the gear 40 which must be provided is determinedby the difierence in pitch between the worms 11 and 13, it being understood that the worm 14 will be of substantially the same angularity as the worm 11, but oppositely 'f It will be obvious that if lever 33 from thebar 15 and to disengage the sections of; the clutch, the entireunit repre- 'sented by the yoke, shaft sections 22 and 23 and" their '"associat-ed mechanism may to register the gear 40 with any of the worms 11 to NVhen the proper alignment with the selected gear is had, a recess 34 1s allgned be I moved as unit longitudinally of the bar 15 may enter the notch.

with the end of the lever 33 and this lever Until this lover does enter the notch, the clutch sections are 1naintained disengaged, so that no drive may take place until all parts are in their proper aligninent.

It will be obvious that with a structure of this character, a "cry quiet drive may be obtained and a transmission may be produced,

which may be much more readily assembled and more cheaply manufactured than the ofth'e invention and I accordingly do notordinary transmission now in use in automobiles. 1

It will also be obvious that the construct-ion hereinbefore set forth is capable of a certain'range of change and modification withoutmateriallydeparting from the spirit limit myself to such specific structure except as hereinafter claimed.

l 1. In transmission mechanism, a drive shaft having a plurality of longitudinallyspaced worms of different pitches, a bar par- 1 alleling said shaft, a yoke slidable on saidbar,

a shaft: supported from the yoke and having a worm .geargmounted thereon for selective engagement with the worms of the shaft,

means for securing the yokein'adjusted positions upon the bar, an output shaft, a drivlng connectionbetween the last named shaft. and

- the output shaft including a clutch and means 1 for releasing the securing means of the yoke and. means for disengaging said clutch. 2. In transmission mechanism, a drive shaft having a'plurality of longitudinally spaced 'worms'of different pitches, a bar paralleling said shaft, a yoke slidable on said bar, a shaft "supported from the yoke and having a worm gearcmounted thereon for selective engagement with theworm's of the shaft, means for securing the yoke in adjusted positionsupon the bar, an. outputfshaft, a driving connection between the last named shaft and the output shaft including clutch, and means for simultaneously disengaging the clutch and releasing the securing means of the yoke.

In transmission mechanism, a drive shaft having a plurality of longitudinally spaced worms of different pitches, a bar par-, alleling said shaft, ayoke slidable on said bar, a shaft supported from the yoke, and havmg a worm gear mounted thereon for selective engagement with the worms of the'shaft, a

pivoted latch lever carried by'the yoke and engageable in notches formed in said bar when the yoke is positioned to properly align the worm gearwith one of said worms and an output shaft having drivingconnection with the last named'shaft in'all positions of the "yoke, the driving connection including a clutch. 1

4.111 transmission mechanism, a drive shaft-having a plurality oflon'gitudinally spaced worms of different pitches, a bar par alleling said sh aft, a yoke slidable" on said bar, a shaft supported from the yoke and having a worm gear mounted thereon for selective engagement with the worms of'tho shaft, a!

spaced worms of. different pitches, abar parallcling said shaft,a yoke slidable on said bar, a pair of aligned sh'aft sections support ed from the yoke and bearing coactingfixed l and movable sectionsof a clutch,one ofsaid I shaft sections having. a worm gear mounted thereon for selective engagement with the worms of the shaft, the other of said shaft sections having permanent driving connec tion'with an output shaft and means for lock- I 7 ing the yoke inadjustedpositions upon the bar wherein the gear is properly aligned with aselected worm of the drive shaft. 7

6; In transmission mechanism, drive shaft having. aplurality ofv longitudinally spaced worms of different pitches, a bar paralleling'said shaft, a yoke slidable on said bar, a pair of aligned shaft sections supported from the yoke and bearing coacting fix'edand shaftsections having a worm gear mounted thereon for selective engagement Wltli the worms of the shaft, the otherof said shaft sections having permanent driving connection with an output shaft, means for locking the yoke in adjusted positions upon the bar movable sections of a clutch, one of said wherein the'gear is properlyjaligned'with a l. I selected worm of the drive shaft, including a pivoted latch lever" havingon'efe'nd there of adaptedfor engagement'in notches-formed 1 in said'bar and means operated by movement 7' of the latch levertodisengage said endfro'm a notchof 'the bar to disengage the sections of the clutch.

. shaft having a plurality of longitudinally spaced worms of different pitches, a bar paralleling said shaft, a yoke'slidable on saidv bar, a pair'of aligned shaft sectionssupport ed from the yoke and bearingcoacting fixed and movable sections of a clutch, 0neofsaid shaft sections having a worm gearmounted thereon for selective engagement with the worms of the shaft, the other of said shaft sections having permanentd'riving connec-"i tion with anoutput shaft,'means for lock-' ing theyoke in adjusted positionsupon the bar wherein thegear is properly'aligned with a selected worm of the drive shaft including 115V 7. In transmission mechanism, a drive a pivoted latch lever having one end thereof notch 0f the shaft whereby disengagement of ,7 adapted for engagement in notches formed in the first named end of the latch lever is acsaid bar, and a shifting fork for said clutch companied by a disengagement of the sec- 10' having its-end positioned adjacent the eppotions of the clutch.

5 site end of the latch level to be engaged there- In testimony whereof I hereunto afiix my by upon operation of the latch lever to dissignature. V V engage the first named end thereof from a HENRY XV. BAKER. 

